Improvement in portable grinding-machines for plate or other rolls



2 Sheets-Sheet 1.

e; w. JONES.

FDRTAIBLE GRINDING MAQHINES FOR PLATE OR OTHER ROLLS.

"Patented Jul 17,1877.- Fig.1.

INVENTEIK NJ'FIERS, FHOTO-LITHOGRAPNEH. WASHXNGTON. D. C.

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a. waoms. PQRTABLE GRINDING MACHINES FOR PLATE OR OTHER. ROLLS.

Patented July -17, 1877.

v NVENTBK .%W X 2/ 02M 'WFI-NEEEEE N.PETERS. PHOfO-LITHQGRAFHEH, WASHINGTON. D O.

GRIFFITH J ONES, OF BEADIN G, PENNSYLVANIA, ASSLGNOR OF ONE-HALF HIS RIGHT TO WILLIAM MOILVAIN & SONS, OF SAME PLACE.

IMPROVEMENT IN PORTABLE GRINDING-MACHINES FOR PLATE OR OTHER ROLLS.

Specification forming part of Letters Patent No. 193,255, dated July 17, 1877; application filed June 26, 1877.

To all whom it may concern:

Be itknown that I, GRIFFITH W. J ones, of Reading, in the county of Berks and ,State of Pennsylvania, have invented certain new and useful Improvements in Portable Grinding- Machines for Plate or other Rolls; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it pertains o make and useit, reference being had to the accompanying drawings, which form part of this specification.

My invention relates to an improvement in portable grinding-machines for turning or truing up plate or other rolls; and it consists in thearrangement and combination of parts, that will be more fully described hereinafter, whereby a portable machine is produced that can be applied to the housings of the rolls so as .to true the rolls up without removingthem from their housings.

The accompanying drawings represent in y invention.

Figures 1 and 2 are views taken from opposite ends of the machine. Fig. 3is a side elevation. Fig. 4 is a plan view with ,a part of the top removed. Figs. 5 and 6 are detail views. Fig. 7 is a modification of my inventiou.

a represents the housings, and b the rolls. These rolls are here shown as widely separated from each other, in their housing, so as to admit of the application of my machine between them. In the opening in each end, in which the upper roll traverses up and down,

are secured the chuck-bearings c, which are held securely iii position by means of the clamps d or any other suitable devices. In these chuck-bearings is placed the square or round tube 0, which is made hollow its entire length and has a slot, f, cut through one of its sides. In this bar is journaled a long screw, g, upon which traverses back and forth a nut, h, which is secured, by means of a setscrew, c to the slide 03.

The tube 6 may be squared'along its surface, in between the housings, so as to prevent the slide from turning upon it, but the bar is round where it passes through its bearings, so

curedthe two emery or other suitable grind-V ing-wheels m. Upon the center of this shaft lis secured the small flanged drivingpulley n, around which passes the belt 0 for imparting a rapid motion to the grindingwheels. It will'be noticed that the arm on bracket projects through between the two rolls, so that the griuding-wheels may be used in grinding or truing up either one, or both, alternately. Upon the end of the-lower roll is the driving-pulley 1), over which pulley passes the belt Q forthe purpose of giving motion to a small pulley, 1', which is journaled upon the arm or projection s that is rigidly clamped, by means of setscrews, to one endof the tube e. Upon the inner side of this pulley r is a spur-wheel, t, which communicates motion to thetwo small pinions 1 that are journaled' upon the swinging lever to that is pivoted upon one end of the screw g. These two pinions arealways in gear with each other, and by moving the lever up or down they may be alternately thrown in gear with the spurwheel t. This swinging lever is provided with notches and a spring-catch, z, to hold it in any desired position, so that when either one of the pinions have been thrown in gear with the spur-wheel, or the two pinions have been turned so that neither one of them will engage with the spur-wheel, this lever cannot accidentally move. Upon the end of the screw 9 is placed a second spur-wheel,- o, with which one of the pinions always meshes.

When the pinion 1 that is nearest to the upperend of the lever is in gear with the spur-wheel o, the screw g is caused to revolve in one direction; and when the second pinion,

l, is in gear with the spur-wheel c, the screw is caused to reverse its motion; and when the two pinions are so placed that neither one of them meshes with the spur-wheel t, the screw remains still and does not revolve in either direction. As the screw is turned in either direction, by means of the nut h, the slide 6 is made to traverse back and forth upon the tube e, so as to move the grinding-wheels along over the surface of one of the rolls from end to end.

Secured to the opposite end of the tube e from the reversing mechanism just described,

by means of a set-screw or other equivalent device, is the lever w, which has secured to it, near its outer end, a swivel-collar, 2, in which is placed the set-screw 3, the lower end of which screw passes through the swivel-nut 4.

By turning this screw so as to raise the outer end of 'the lever upward the tube 6 is partially turned in its bearings, so as to throw the bracket which carries the grinding-wheels upward, so as to bring the wheels in contact with the surface of the upper roll. By depressing the outer end of the lever the bracket is turned downward, so as to bring the grinding-wheels in contact with the surface of the traverse back and forth upon this large driv-- ing-roll from 'end to end. ,It will be seen that my machine is portable and can be used for truing 'up the rolls without the trouble and expense of removing the rolls from their housing.

After my invention has once been set in motion the grinding-wheels traverse back and forth along the surface of the rolls, and require but little attention in their management.

Instead of the grinding-wheels being secured to the frame by chuck-bearings, as

shown, they may be secured upon a swinging frame that is pivoted overhead, so as to be let down when they are needed and drawn up out of the way when not in use. In this case the driving-roll 6 will be journaled above the bracket j on a hanging pivoted beam, 0. The bar 0 will be secured to the side of the beam, near its lower end, and the bracket j will project straight out from its side. With the exception that these parts are differently located, their operation is just the same.

Having thus described my invention, what I claim, and desire to obtain from Letters Patent, is-

1. The combination of the pulleys p r, belt Q, wheels t v, pinions 1, arms 8, and lover u, whereby the motion of the screw is reversed, substantially as shown.

2. In combination with the housing and rolls, the chuck-bearings c, and the tube e, the

. same being applied in the openings in the housing of the rolls, substantially as described.

3. The tube a, having a slot, f, cut in its side, screw g, nut h, slide 7;, grinding-wheels, and a mechanism for reversing the motion of the screw, so as to cause the grinding-wheels to traverse back and forth over the surface of the rolls, substantially as specified.

4. The tube 6, having the lever w, secured 'to one end, in combination with a set-screw 

